Red Alert Is Coming: I Have Infinite Armored Divisions in the End of the World

The world is suddenly facing an apocalypse. Zombies are rampant, alien beasts are raging, and human civilization is on the verge of collapse. Social animal Ye Feng traveled back to the moment before the apocalypse broke out and accidentally activated the red alert summoning system. Build mines to collect resources, train soldiers, snipers, and engineers, and build a steel defense line composed of flying soldiers and phantom tanks to resist the tide of zombies, clear out alien beasts, and gather surviving humans. Starting from a small base, regain lost ground step by step, and use red alert technology to rebuild a new human order on the ruins of the apocalypse.